In July 1793, Alexander Mackenzie (1764-1820), fur trader and explorer, was the leader of the first expedition to cross the North American continent from the Atlantic to Pacific north of Mexico.
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At the western terminus of his journey point he inscribed "Alex MacKenzie / from Canada / by land / 22d July 1793" on a rock using a reddish paint made of vermilion and bear grease and turned around to return to "Canada".The rock still bears these words which were permanently inscribed later by surveyors:
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The Alexander MacKenzie commemorative stamp was issued on June 25, 1970.
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National Archives of Canada
First Day Covers
Canada Post Office Publicity First Day Cover
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Mailed to the Austrian Philatelist, Vienna, Austria
Insert written in German
Shering
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Jackson
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Overseas Mailers
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Royal Philatelic Society
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Rosecraft
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H & E
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Uncacheted
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To Razaieh, Iran
12 cents UPU surface letter rate
Elliot-Marion
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Cole Cover
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David Pritchard
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Usages
Domestic Letter
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Toronto local correspondence, July 14, 1970
6 cents domestic letter rate
International Surface Post Card
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Toronto to Zagreb, Yugoslavia, August 1970
7 cents UPU surface post card rate
Shortpaid 1 cent and taxed 2/12 :
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The Yugoslavian post office charged 0.40 dinar
(The tax fraction system is explained HERE)